Elevator automatic safety appliance.



F. G. HENKLE. ELEVATOR AUTOMATIC SAFETY APPLIANGE. APPLICATION FILEDMAR.18,1912.

1,044,174, Patented Nov. 12, 1912.

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' UNITED STATES PATENT onnron.

FRANK G. HENKLE, F INDIANAPOLIS, INDIANA, ASSIGNOR OF TWO-FIFTI-IS TOORVILLE EBAY, OF INDIANAPOLIS, INDIANA.

ELEVATOR AUTOMATIC SAFETY APPLIANCE.

To all whom it may concern:

Be it known that I, FRANK G. I-Innnnn, a citizen of the United States,and a resident of Indianapolis, county of Marion, and State of Indiana,have invented a certain useful Elevator Automatic Safety Appliance; andI do hereby declare that the following 1s a full, clear, and exactdescription thereof, reference being had to the accompanying drawings. r

The object of this invention 18 to provide an improved safety device foruse in connection with the controlling cable of an elevator, whereby itwillbe impossible to start 5 the same until the door or othercoveringhas been opened at the upper end of the shaft or well.

The invention is particularly adapted for use with side walk freightelevators and by its use will prevent the frequent accidents which haveresulted from starting the elevator car without first raising the sidewalk doors above the elevator shaft and afterward attempting to lift thedoors andopen 5 them from beneath as the elevator car 1s ascending.

The feature of the invention lies in providing a stop upon the undersideof the door or shaft covering which will have engage- 3 ment with ablock secured to the shift cable when the car is stopped and willprevent the car from being started upward until the shaft covering hasbeen raised.

The nature of the invention will be understood from the accompanyingdrawings and the following description and claims.

In the drawings, Figure l is an elevation of a side walk elevator withthe overhead doors closed and with my invention installed thereon andshowing the car in its lowest position. Fig. 2 is the same as Fig. 1,butwith the doors opened and with the car in its upper position. Fig. 3 isa perspect1ve of the device with portions broken away.

5 There is shown'in the drawings an elevator operating between the levelof the basement floor 11 and the level of the side walk 12- and which isoperated by means of the well known shift cable 18. Doors 1 1 hinged atthe side walk serve to cover the shaft 15 of the elevator. Secured tothe left hand door 14:, as shown in Fig. 1, there are two L- shapedstraps 16 which project at right angles from the door and are spacedapart 3 a short distance and between them one end Specification ofLetters Patent.

Application filed March 18, 1912.

Patented Nov. 12, 1912.

Serial No. 684,533.

of a rod 17 is pivoted, the lower end 18 of which is bent at rightangles and upon the end of the bent portion a hook or loop 19 issecured, through which one side of the shift cable 13 may operate. Whenthe elevator is stopped andwhen the doors are closed the strap 16 andthe rod 17 will assume the position shown in Fig. 1 and the stop block20 is secured upon the shift cable 13 in such a position as to engagethe underside of the loop 19 upon the bent end of the rod 17. To startthe elevator and cause it to ascend the right hand cable is given adownward pull, as shown by the arrow in Fig. 1, butshould the doors beclosed, the block 20 engaging the underside of the loop 19 will preventits movement of the cable, and the elevator car cannot be started untilthe overhead doors 14 have been raised. This will move the straps 16 androd 17 to the-position shown in Fig. 2, and the shift cable can then beoperated to cause the car to ascend.

The utility of this device is self evident and it will be readily seenthat it will be impossible for the operator to be injured by beingcrushed between the elevator car and the overhead door by having failedto open them before he started the car as it would be impossible tostart until after he had opened the doors.

I claim as my invention:

1. The combination with an elevator, an elevator car, a shaft covering,and means for causing the operation of the elevator car, of a stopsecured to said operating means, and means intermediate said stop andsaid shaft covering whereby when the elevator shaft is closed by saidcovering said operating means will be held and the elevator car willbekept from moving.

2. The combination with an elevator, an elevator car, a shaftcovering,and means for causing the operation of the elevator car, of astop secured to said operating means, and means intermediate said stopand said shaft covering and in engagement therewith when the elevatorshaft is closed by said covering for holding said operating meanswhereby the elevator will be kept idle.

3. The combination with an elevator, an elevator car, a covering for theelevator shaft, and flexible means for causing the operation of theelevator car, of a stop block secured to said operating means, and meansintermediate said stop and said shaft covering and in engagementtherewith when the elevator shaft is closed by said covering for holdingsaid operating means whereby the elevator will be kept idle.

4c. The combination with an elevator, an elevator car, a door forclosing the elevator shaft, and flexible means for causing the operationof the car, of a stop secured to said operating means, and means securedto said door and extending into engagement with said operating means andwith said stop when said door is closed for holding said operating meanswhereby the elevator car will be kept idle.

5. The combination with an elevator, an elevator car, a door for closingthe elevator shaft, and flexible means for causing the operation of thecar, of a stop secured to said operating means, a rod pivotally securedto said door and movable therewith and with one end surrounding saidoperating means above said stop and in engagement with said stop whensaid door is closed, and means secured to said door and extending intoengagement with said operating means and with said stop when said dooris closed for holding said ope 'ating means whereby the elevator carwill be kept idle.

In witness whereof, I have hereunto afiixed my signature in the presenceof the witnesses herein named.

FRANK G. HENKLE.

Vitnesses G. H. BOINK, E. H. MAYO.

Gepies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

